<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>html_全局属性</title>

</head>
<body>
    <div id="hello1">你好啊！</div>
    <div id="hello2">你好啊2！</div>
    <div class="student">张三</div>
    <div class="student">李四</div>
    <div style="color: aquamarine;">李四</div>
    <bdo dir="rtl">你是年少的欢喜</bdo>
    <div dir="ltr">喜欢的少年是你</div>
    
</body>
</html>